___ is the most useful invention?
#32091
A
Do you think which of these
B
Which of these you know
C
Which of these do you know
D
You know which of these
推荐题目
The children ran away from the orchard(果园)________ they saw the guard.
#32861
A
for the moment
B
by the moment
C
the moment
D
at the moment
You will succeed in the end ________ you give up halfway.
#32435
A
even if
B
as though
C
as long as
D
unless